Which maintenance check is due every 100 hours of flight time?

The correct answer is indeed the 100-hour inspection, which is a specific type of maintenance check mandated by the Federal Aviation Administration (FAA) for certain aircraft, especially those used for hire or flight instruction. This inspection must be performed after the aircraft has accumulated 100 hours of flight time, and it ensures that the aircraft is safe and airworthy for continued operation.

During the 100-hour inspection, a thorough examination of the aircraft is conducted, including checks of the engine, systems, and other critical components to identify any potential issues that could affect safety. This inspection is not as comprehensive as the annual inspection, which must be performed once a year regardless of flight time, but it is nonetheless crucial for ensuring ongoing flight safety in operational contexts.

In addition to this, if an aircraft is used for commercial purposes or flight training, this check is vital to comply with regulatory standards, ensuring that the aircraft remains in proper working condition between annual inspections.